Key-operated lock.



F. BISESI.

KEY OPERATED LOCK.

APPLIOATION FILED 00T. 3, 1911.

Patented May 21, 1912.

3 SHEETS-SHEET 1.

ZEIE;

WIT/758858 F. BISESI.

KEY OPBRATED LOCK. APPLICATION HLED ocT. 3, 1911.

Patented May 21, 1912.

3 SHEETS-SHEET 2.

TUHIVEYS "F. BISESI.

KEY OPERATED LOCK. APPLIOATION FILED 00T. a, 1911.

' Patented-Mayu, 1912.

:i slums-SHEET a.

WITNESSES ATTORNEYS COLUMBIA PLANOGRAPH CO..WASH1NGTON. u, c.

FRANCESCO BISESI, OF NEW YORK, N. Y.

KEY-OPERATED LOCK.l

Specicaton of Letters Patent.

Patented May 21, 19172.

Application led October 3, 1911.` Serial No. 652,503. f

To all whom it may concern: n

Be 1t known that I, FRANCESCO BisEsI, a

subject of the King of Italy, and a resident a plurality of bolts to augment the strength of the fastening; to provide in a lock of the character described a plurality of keys operable successively upon a lock bolt which keys when used in reversed order retract the bolt previously protruded; to provide a Y lock of the character 4mentioned with `a safety or secret latch to lock the bolt in full extended posit-ion to require the release of the latch prior to retracting said bolt; and to provide a lock operable by a plurality of keys t-he use of each successive key placing the lock in position to prevent the use of a .preceding key. f

One embodiment of the present invention is disclosed in the st-ructure illustrated in the accompanying drawings, in which like characters of reference denote correspond- 30..ing partsin all the views, and in which- Figure 1 is a side view of a lock constructed and arranged in accordancev with the present invent-ion, the cover plate of the lock being removed; Fig. 2 is a similar view fthe guard plate shown in Fig. 1 being removed to Vshow one set of tumblers and the service key employed in conjunction with the present lock; Fig. 3 is a cross section taken on the line 3-3 in Fig. 1; Fig. 4 a section taken on the line 4 4 in Fig. 2; Figs. 5 and 6 are side views of fragments -of the lock constructed in accordance with f the present invent-ion, showing the disposition of the tumblers and service bolt of the 'lock prior to and after being Shot by the operation of the service key; Fig. 7 is a view similar to Fig. 2 showing the service and auxiliary bolts after being shotto full locked position by the operation of the mas- Ater key; Fig. 8 is a side view of a fragment Vof the lock, Ashowing the bolt'locking latch with which the present lock is provided; Fig. 9is across section of a fragment of the lock the section being taken on the line 9-9 -in Fig. 8, showing in conjunction therewith the master key of the lock; Fig'. 10 is a side view of the service key employed in con- Junction with the lock herein described; and Fig. 11 `is a side view of the master key emn ployed 1n conjunction with the lock herein 50 described..

As Seen in the accompanying drawings, the lock is bolts, which for the convenience of description I have designated as the service bolt 16V 65 and the auxiliary bolts 17 17 The auxiliary bolts 17, 17, under certain conditions of the service bolt 16, are operated thereby to project or retract the same. For this purpose the' service bolt 16 is provided with a 70. tail piece 18, from the side whereof are extended the lugs 19, .19 and the shoulders 20,

20. Between the lugs 19 and shoulders 2O are extended the ends of the arms 21, 21, which arms are extended fromand rigidly secured to the guide rods 22 of the said auxiliary bolts. To support the auxiliary bolts in their reciprocated action the striker plate 23 is perforated for the pas* sage therethrough of each of the bolts 17. The rods 22 are extended between the arms of a guide plate 24. Each of the plates 24 takes the thrust of a spiral spring 25 which* is wound about each of the rods 22. The springs 25 normally operate to retract the 85 bolts 17 when so permitted by the movement of the Service bolt 16. l

Normally the springs 25 are extended to their full limit, as shown in Figs. 1 and 2 of the drawings, where, as therein shown, the ends of the auxiliary bolts 17 are flush with the striker plate 23. In this ,position the 'inner ends of the bolts 17 rest the one on the plate-24 and the other against the Side of the structural bolt- 26.

The service bolt 16 is operated by the service key 27 Ato be extended',` as shown in Fig.

y6 of the drawings. In the full extended position to which the service key 27 may move the said bolt, the lugs 19 rest in juxtaposed 100 relation to but do not bear upon the arms 21. It will be understood that the normal operation of the service bolt 16 is within the limits between the back plate of the casing 28 and the normal position of the arms 21. 105 It is when the service bolt 16 is moved by the master key 29 to the extreme forward position, as shown in Fig. 7, that the lugs 19 serve to'V press on the arms 21 to move the auxiliary bolts 17 tothe full locked position, 110

provided with a plurality of .s

as seen in Fig. 7 of the drawings. Under other conditions the springs 25 operate to maintain the bolts 17 retracted with the forward ends thereof flush with the striker plate 23.

The bolt 16 is held in its operative position by a dog 30, mounted rigidly on the said bolt and extended from the side thereof, which dog 30 is successively engaged by the pivoted tumbler plates 31. Each of the plates 31 is provided with a longitudinal slot 32 having extended therefrom offsets of recesses 33 and 34. The plates 31 engage the dog 30 by the lat-ter passing into the recesses 33 and 34, the sides whereof impinge upon the said dog and prevent the retraction of the bolt 16.

The tumbler plates 31 are pivotally mounted on the post 35, which is fixed upon the side of the casing 23 and further serves as a guide for the bolt 16, a. slot 36 being formed in the tail piece 18 to receive the said post. The tumbler plates 31 are depressed by the springs 37 which anchor in a housing 38 of any suitable construction.

It will be understood that when the bolt 16 is locked in the extreme forward posi tion the recesses 34 of thev tumbler plates 31 engage the dog 30. By the operation of the service key 27 the plates 31 may be lifted,

in which position the springs 25 would retract the bolts 16 and 17, thus defeating the purpose for which the present lock is intended.` It is designed that when the service bolt 16 and the auxiliary bolts 17, 17 are fully extended, as shown in Fig. 7 of the drawings, the recesses 39 formed in the tumbler plates 40 will hold the dog 30 to maintain the bolts in the locked posit-ion irrespective of the movement of the plates 31. The master key 29 is provided with a set of wards the duplicates of the wards in the service key, and this to enable the master key to lift the tumbler plates 31 and 40 simultaneously, thereby freeing the dog 30 from engagement with both the recesses 34 in the plates 31 and the recesses 39 in the plates 40.

The plates 31 and 40 are divided by the partition 41 in which is formed a longitudinal slot for t-he movement of the dog 30 and the key opening 42 for the passage of the master key 29.

To accommodate the service key 27 the bolt 16 is provided with the shoulders 43, spaced apart to be moved successively into the forward and rearward path of the ward of the key 27, to be engaged thereby to advance the bolt 16 to the position shown in Fig. 6, and to retract t-he same to the position shown in Fig. 2, the said ward of the key 27 passing out of engagement of each of the said shoulders at the extreme of its forward or rearward movement. When the key 27 has disposed the bolt in the position shown in Fig. 6 of the drawings the shoulders 44 have been moved into position to be engaged by the ward of the master key 29 when the same is now inserted in the lock. The dog 30 has been moved forward to the position shown in Fig. 6 where it rests in the recess 33 preventing the retraction or advance of the bolt 16 except as the tumbler plates 31 be lifted. The inner shoulder of the projection 45 formed on the plates 40 also serves to block the further projection of the bolt 16 and dog 30 unless the said plates 40 be lifted. It is the master key 29 only which possesses the wards capable of lifting both sets of plates 31 and 40, therefore the key 27, though it engage the shoulders 44 of the bolt 16, may not move the bolt 16 to the full locked position shown in Fig. 7. rlhe key 29 is relied upon to shoot the bolts 16 and 17 to the full locked position shown in Fig. 7, and to retract the same from the position shown to the position shown there in Fig. 6. From the position shown in Fig. 6 the key 27 is relied upon to retract the service bolt 16.

Thus, it will be seen that the lock is variously operated by two separately shaped keys, one of the said keys operating the lock for what are here termed service conditions and the other for a permanent closure. The employment of separate keys renders it possible, if the custodian have the so-called master key, to place'the lock in position-to prevent the release by the custodian of the service key, while the service key is utilized for ordinary securement of the lock. A

It is to prevent the' picking of the lock by the usual method of obtaining an impression of the tumblers and from such impression manufacturing a suitable key to operate the lock, that I have provided the latch bar 46. The latch bar 46 is pro-vided wit-h a spring section 47 and is secured by the rivet 48 to a cover plate 49. The plate 49 holds in operative position the plates 40. In the said plate a slot 50 is formed lengthwise of which the dog 30 travels as the bolt 16 is manipulated. At the far end of the slot 50 the dog 30 passes under the bar 46, the spring section 47 yielding to permit the lift of the said bar as the dog passes thereunder to seat the said bar at the rear of said dog to prevent the return thereof. In the above described position it is obvious that the bolt 16 to which the dog 30 is rigidly attached may not be retracted until the bar 46 is removed from engagement with the dog 30. For this purpose the bar 46 is provided with an arm 51, upon the end whereof is mounted a pin 52. The pin 52 is centrally disposed in a guide tube 53 which is likewise rigidly secured on the arm 51. The tube 53 forms an interior guide for the key 29, fitting as it does the tubular end Then the key 29, having the plunger pin,

55 mounted therein, is inserted in the keyhole 58 and passed through the opening 42, the operation is as Vfollows: The key is turned to the position shown in Fig. 9 of the drawings, the wards 59 and 60 lifting the tumblers 31 and 40 respectively to remove the recesses 33, 34 and 39 from engagement with the dog 30. The operato-r now presses upo-n the button 56 which relnoves the bar 46 from the path of the dog 30 and permits the springs 25, 25 to retract the bolts 17, 17 and 16 to the service position of the bolt 16, as shown in Fig. 6 of the drawings. The key 29 is then revolved and withdrawn. It will be observed, however, that the bolt 16 is not retracted and that the closure member upon which the lock is mounted is not free. It requires the further operation of the service key 27, which is now inserted to engage one of the shoulders 43, to move the bolt 16 to the full released position shown in Fig. 2 of the drawings.

Vhile I have herein detailed the construction and arrangement of the various parts shown in the accompanying drawings as disclosing the embodiment of the invention, I do not wish to be limited to the particular construction and arrangement of the said instrun'ientalities, as these may be varied without affecting the invention.

Having thus described my invention,what I claim as new and desire to `secure by Letters Patent is 1. In a lock of the character described, a bolt to progressively assume successive locking positions; a plurality of engaging tumblers for said bolt to hold the said bolt in each of its assumed positions; and al plurality of keys to move said bolt each of said keys having wards to release one of said tumblers from. holding relation to said bolt, and one of said keys provided with wards to engage all of said tumblers to move the same in position to release said bolt.

2. In alockof the character-described, a bolt to progressively assume successive locking positions; a plurality of engaging tumblers for said bolt to hold the said bolt in.

each of its assumed positions; a plurality of keys to move said bolt, each of said keys having wards to release one of said tumblers from holding relation to said bolt, and one of said keys provided with wards to engage `allof said tumblers to move the same in polsition to release said bolt; and a spring actuated latch independent of said tumblers to lock said bolt in one of said positions.

3. In a lock of the character described, a bolt to progressively assume successive locking positions.; a plurality of engaging tumblers'for said bolt to hold the said bolt in each of its assumed positions; a plurality of f keys to move said bolt, each of said keys having wards to release one of said tumblers vfrom holding relation to said bolt, and one of said keys provided with wards to engage all of said tumblers to move the same in position to release said bolt; a spring actuated lat-ch independent of said tumblers to lock said bolt in one of said positions; and means carried by said key having the wards for all of said tumblers for releasingl said latch.

4. In a lock of the character described, a bolt `to progressively assume successive locking positions; a plurality of engaging tumblers for said bolt to hold the said bolt in each of its assumed positions; a plurality of keys to move said bolt, each of said keys having wards to release one of said tumblers from holding relation to said bolt, and one of said keys provided with wards to engage all of said tumblers Vto move the same in position to release said bolt; a spring actuated V latch independent of said tumblers to lock said bolt in one of said positions; and a plungeripin reciprocatively mounted in the key having wards to release all of said tumblers, said pin arranged to release said .latch when said key is in operative position in said lock.

5. A lock such as described, having a rality of keys, each having wards, a portion oi the wards of one of said keys being duplicates of all the wards on the other of said keys.

6. A lock such as described,having a service bolt; two sets of tumblers to hold the bolt in two extended positions, one of said sets being adapted to hold the bolt in both of said positions, and the other of said sets to hold the bolt in one only of said positions; and a plurality of keys adapted to engage the said bolts to move the same; one of said keys having wards to engage the set of tumblersr` which hold the bolt vin the rtwo positions,y the other of said keys having wards the duplicate of the wards on the other of said keys; and an extra set of wards to engage the said tumblers which an auxiliary latch to engage the bolt in the fullest-extended position only; a key having two sets of Wards variously arranged to engage both sets of said tuinblers, to release said bolt; means Carried by said key for releasing said auxiliary latch from engagement from said bolt; and a second key, having Wards to engage the said set of tulnblers adapted to hold the boltin bot-h positions,

said Wards being duplicates of one set of 10 Wards on the other of said keys.

ln testimony Whereoi:l I have signed iny naine to this speeiiication in the presence of two subscribing Witnesses.

FRANCESCO BISESI. lVitnesses FRANK SALLI, PHILIP D. RoLLi-IAUS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

